Numerical simulation analysis of tunnel construction mechanical response considering shotcrete hardening process

Abstract At present, tunnel construction mechanics studies basically do not consider the hardening process of shotcrete. In order to reveal sprayed concrete in a sulfate environment and influence corrosion on stability, model parameters were determined combination with change rules mechanical shotcrete obtained author’s experiment. The MIDAS GTSNX finite element software was used analyze effect shotcrete, chemical corrosion, physical displacement stress surrounding rock tunnel. results show that considering growth rate clearance increases, increase slows early stage (The lining structure is applied, second step excavation carried out). With time or steps, increases significantly, significantly decreased. similar indicating has an inhibitory increased risk.